Chemical Reactions
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| Chemical Reactions | a process in which the physical and chemical properties of the original substances change as new substances with different chemical and physical properties are formed
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| The properties and energies of the substances always change when, | a chemical reaction take place
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| Reactant | substance that enters into a chemical reaction, a starting substance in a chemical reaction
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| Product | a substance formed or produced by a chemical reaction
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| Coefficient | the big number in front of symbols/formula
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| What does the arrow mean? | yields or produces
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| Exothermic | energy is given off (something that is burning or gives off light)
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| Endothermic | energy is absorbed (photosynthesis or test tube gets colder)
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| Activation Energy | the energy needed to form short-lived, highly energetic, extremely unstable, intermediate molecules that are rearranged to form products in the chemical reaction
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| In order for a chemical reaction to occur | the reactants must have the ability to combine with substances to form products
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| An atom bonds with another atom | to complete its outermost energy level
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| Atoms can be | neither created nor destroyed
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| Evidence Of Chemical Reaction | ~precipitate produced
~unexpected color change
~light emitted
~gas released/bubbles
~energy change
~temp increase/decrease due to absorption or release of heat
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| Catalyst | substance that speeds up the rate of a reaction but is not used up in the reaction
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| All metals | are singular
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| Non noble gases are | diatomic
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| The diatomic gases are | N2, O2, F2, Cl2, Br2, I2, H2
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| How many types of basic chemical reactions are there? | 5
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| What are the five reactions? | combination (synthesis)
decomposition
single replacement
double replacement
combustion
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| Synthesis | sometimes called combination, two or more simple substances combine to form a new, more complex substance
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| Metallic oxides react with water | to form bases
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| Decomposition | a complex substance breaks down into two or more simpler substances
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| Combustion | also called an oxidation reaction
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| Single Displacement | one element replaces another element in a compound
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| Double Displacement | different atoms in two different compounds replace each other
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| Aqueous | whenever something is dissolved in water
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| Precipitate | insoluble solid that separates form solution
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| Net Ionic Equation | a chemical equation that involves compounds dissolved in water
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| Net Ionic Equation Shows | all the soluble ionic solutions as ions
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| Spectator Ions | there are ions that do not take part in a chemical reaction and are found in solution before the reaction and after they do not participate
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| Molecular | two nonmetals bonded together cannot dissociate into ions
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| Ionic | metal + nonmetals contains polyatomic ions, always dissociate into ions if aqueous
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Created by:
jordinlevy
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